The 405 Freeway will continue to undergo a $1.9 billion expansion between State Route 73 and the 605 Freeway – adding regular and carpool lanes and widening or reconstructing more than 18 bridges. Work will continue all year, with completion expected in 2023.

“It has been decades since there has been an expansion like this,” Orange County Transportation Authority spokesman Joel Zlotnik said. “This is the largest (project) that OCTA has undertaken.” Nearly $600 million will be spent on two major projects that will start on the 5 Freeway in 2019: Adding a carpool lane between State Route 55 and State Route 57, and adding a regular traffic lane between Avery Parkway and Alicia Parkway.